Influence of alloying elements and microstructure on the formation of hydrotalcite film on Mg alloys

Chen, Jun; Song, Yingwei; Shan, Dayong; Han, En‐Hou

doi:10.1016/j.corsci.2015.01.008

Cited by 39 publications

(17 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the self-sealing pore MAO film mainly contains MgO, MgF 2 and titanium oxides. All magnesium ions in the film come from the dissolution of Mg substrate [22]. The dissolved Mg 2+ ions from Mg substrate migrate outward, while F -and O 2-migrate inward in the discharge channels under the effect of electrical field [18].…”

Section: Investigation Of Corrosion Behavior By Immersion Testsmentioning

confidence: 99%

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

et al. 2015

Self Cite

View full text Add to dashboard Cite

Section: Investigation Of Corrosion Behavior By Immersion Testsmentioning

confidence: 99%

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

et al. 2015

Self Cite

View full text Add to dashboard Cite

“…Chromium-free acid salt treatment includes: phosphate conversion coating [23,24], phosphate-permanganate conversion coating [25][26][27], stannate conversion coating [28,29], vanadate conversion coating [30,31], cerium conversion coating [32,33], lanthanide conversion coating [34], hydrotalcite surface coating, and so forth [35,36]. Hydrotalcite coating has attracted much attention, due to its unique intercalation structure and its environmentally friendly properties [37][38][39][40][41][42][43][44][45][46][47][48][49][50]. Uan et al [37][38][39][40][41][42][43] has conducted some research on hydrotalcite coatings prepared on magnesium alloys, by adopting a one-step method.…”

Section: Introductionmentioning

confidence: 99%

Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method

et al. 2019

View full text Add to dashboard Cite

The formation process of LDHs (layered double hydroxides) coating on magnesium alloy by the CO2 pressurization method was studied. The micro-structure was observed by OM, SEM and GAXRD. The weighted gain curve, apparent activation energy, and CO2 solubility curve were all calculated by equations. The potentiodynamic polarization curve, hydrogen evolution data, and immersion were analyzed by an electrochemical method. The results show that the LDHs coating was formed layer-by-layer. The formation positions were initially on the α-Mg phase, and then on the β-Mg17Al12 phase. It was found to be the most compact after 30 min. The LDHs coating began to appear to have severe cracks and holes over time. The formation process of the LDHs coating can be divided into three stages: a rapid growth stage (0–10 min), slow growth stage (10–20 min), and periodic growth stage (30 min, 1 h). The apparent activation energies in each of the three stages are 21.78, 31.86 and 34.92 kJ mol−1, respectively. The LDHs coating has a compact micro-structure and better anti-corrosion at a pressure of 3 MPa, a temperature of 50 °C and a time of 30 min. The CO2 pressurization promotes a formation reaction rate and achieves a high formation efficiency and good formation stability under the condition of zero pollution.

show abstract

“…However, rapid corrosion rate still exists which cannot meet the demands of medicine. Chen et al 19 fabricated Mg-Al HT¯lm on the WE54 alloy, but the corrosion ressitance of the HT¯lm is very poor due to the non-uniform¯lm with masses of cracks on WE54 alloy. Meanwhile, there has been limited information on the biologic performance of HT¯lm on the magnesium alloy, though the HTs have good biocompatibility and low toxicity.…”

Section: Introductionmentioning

confidence: 99%

“…However, the current processes for fabricating HT coatings are mostly available for the Al-rich Mg alloys [12][13][14][15][16] and low Al content Mg alloys, 17,18 relatively few literatures about the HT¯lm on the other Mg alloys (Al free), 19,20 especially about the rareearth (RE) magnesium alloys. The existence of Al element in Mg alloys will result in mental numbness, hindering the application of HT¯lm in medical¯eld.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Mg-Al hydrotalcite (HT), which is prepared with carbonated water, [12][13][14][15][16][17][18][19][20] has become a chromate-free, environment-friendly coating to improve the corrosion resistance of Mg alloy. However, the current processes for fabricating HT coatings are mostly available for the Al-rich Mg alloys [12][13][14][15][16] and low Al content Mg alloys, 17,18 relatively few literatures about the HT¯lm on the other Mg alloys (Al free), 19,20 especially about the rareearth (RE) magnesium alloys.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

FORMATION AND CORROSION RESISTANCE OF Mg–Al HYDROTALCITE FILM ON Mg–Gd–Zn ALLOY

Dong

Kong

et al. 2016

Surf. Rev. Lett.

View full text Add to dashboard Cite

An environment-friendly technique for depositing a Mg-Al hydrotalcite (HT) (Mg 6 Al 2 (OH) 16 -CO 3 Á 4H 2 O) conversion¯lm was developed to protect the Mg-Gd-Zn alloy from corrosion. The morphology and chemical compositions of the¯lm were analyzed by scanning electronic microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), X-ray di®raction (XRD) and Raman spectroscopy (RS), respectively. The electrochemical test and hydrogen evolution test were employed to evaluate the biocorrosion behavior of Mg-Gd-Zn alloy coated with the Mg-Al HT¯lm in the simulated body°uid (SBF). It was found that the formation of Mg-Al HT¯lm was a transition from amorphous precursor to a crystalline HT structure. The HT¯lm can e®ectively improve the corrosion resistance of magnesium alloy. It indicates that the process provides a promising approach to modify Mg-Gd-Zn alloy.

show abstract

Influence of alloying elements and microstructure on the formation of hydrotalcite film on Mg alloys

Cited by 39 publications

References 37 publications

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

Corrosion behavior of a self-sealing pore micro-arc oxidation film on AM60 magnesium alloy

Formation Process of an LDHs Coating on Magnesium Alloy by a CO2 Pressurization Method

FORMATION AND CORROSION RESISTANCE OF Mg–Al HYDROTALCITE FILM ON Mg–Gd–Zn ALLOY

Contact Info

Product

Resources

About